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From Andreas Klöber (JIRA) <xmlbeans-...@xml.apache.org>
Subject [jira] Updated: (XMLBEANS-382) Twice traversion of XmlBeans DOM-implementation fails
Date Mon, 29 Sep 2008 08:20:44 GMT

     [ https://issues.apache.org/jira/browse/XMLBEANS-382?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andreas Klöber updated XMLBEANS-382:
------------------------------------

    Attachment: xmlBeansTest.zip

code and resources for the demonstration

> Twice traversion of XmlBeans DOM-implementation fails
> -----------------------------------------------------
>
>                 Key: XMLBEANS-382
>                 URL: https://issues.apache.org/jira/browse/XMLBEANS-382
>             Project: XMLBeans
>          Issue Type: Bug
>          Components: DOM
>    Affects Versions: Version 2.4 
>         Environment: Windows Xp Professional, Sun JDK 1.5.0-16
>            Reporter: Andreas Klöber
>            Priority: Critical
>         Attachments: xmlBeansTest.zip
>
>
> After parsing an XML-file with the generic XmlObject.Factory.parse-method the traversion
of the DOM-Reprsentation fails the second time. The following shortened example demonstrates
this:
> content of example_fail.xml:
> <a>
> 	<!--comment-->
> 	<b>example</b>
> </a>
> example-code:
> <code>
> import java.io.File;
> import org.apache.xmlbeans.XmlObject;
> import org.w3c.dom.Document;
> import org.w3c.dom.Node;
> public class XmlBeansBug {
> 	
> 	private static String EXAMPLE_XML_FILE_FAIL = "example_fail.xml";
> 	private static void traverseNodes(Node node){
> 		//get first child (<a>-node)
> 		Node aNode = node.getFirstChild();
> 						
> 		//get next child (#TEXT-node)
> 		Node textNode1 = aNode.getFirstChild();
> 				
> 		//get next sibling (#COMMENT-node)
> 		Node commentNode = textNode1.getNextSibling();
> 		
> 		//get next sibling (second #TEXT-node)
> 		boolean hasCommentNodeChildes = commentNode.hasChildNodes();
> 		System.out.println("  has comment-node child-nodes: " + hasCommentNodeChildes);
> 		
> 		if(hasCommentNodeChildes){
> 			Node chilfOfCommentNode = commentNode.getFirstChild();
> 			System.out.println("  child of comment-node is: " + chilfOfCommentNode);
> 		}
> 		
> 		Node textNode2 = commentNode.getNextSibling();
> 		//get next sibling (<b>-node)
> 		Node bNode = textNode2.getNextSibling();
> 	}
> 	public static void main(String[] args) throws Throwable {
> 		XmlObject exampleFailXmlObject = XmlObject.Factory
> 				.parse(new File(EXAMPLE_XML_FILE_FAIL));
> 		Document exampleFailDocument = (Document) exampleFailXmlObject
> 				.getDomNode();
> 		System.out.println("First run:");
> 		traverseNodes(exampleFailDocument);
> 		System.out.println("Second run:");
> 		traverseNodes(exampleFailDocument);
> 	}
> }
> </code>
> The first time hasChildNodes() on the comment-node returns false, which is correct. The
second time it returns true althoughthere have only been reading operations on the DOM-model.
The further call of getFirstChild() returns null although the previous call to hasChildNodes()
returned true.

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